package org.example.thread;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.TimeUnit;

/*
 *Author:ZouHeng
 *Des: 测试wait()和notify()、notifyAll()
 *Date:2021-01-04  13:44
 */
public class WaitNotify {
    private static boolean flag = true;
    private static Object lock = new Object();

    public static void main(String[] args) {
        Thread waitThread = new Thread(new Wait(), "WaitThread");
        waitThread.start();
        try {
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Thread notifyThread = new Thread(new Notify(), "NotifyThread");
        notifyThread.start();
    }

    public static class Wait implements Runnable {

        @Override
        public void run() {
            synchronized (lock) {
                while (flag) {
                    try {
                        System.out.println(Thread.currentThread() + " flag is true, " + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                        lock.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                System.out.println(Thread.currentThread() + " flag is false, " + new SimpleDateFormat("HH:mm:ss").format(new Date()));
            }
        }
    }

    public static class Notify implements Runnable {

        @Override
        public void run() {
            synchronized (lock) {
                System.out.println(Thread.currentThread() + "hold lock notify " + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                lock.notifyAll();
                flag = false;
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            synchronized (lock) {
                System.out.println(Thread.currentThread() + "hold lock notify again" + new SimpleDateFormat("HH:mm:ss").format(new Date()));
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}
